A long period of time, often exaggerated to mean an indefinitely long time.

अनंत काल

English Usage: The mountain has stood for eons, witnessing the changes in the landscape.

Hindi Usage: पहाड़ अनंत काल से खड़ा है, परिदृश्य में परिवर्तनों का गवाह।

Having lived for a long time; not new or recent.

बूढ़ा

English Usage: The ancient tree is eons old and has seen many generations come and go.

Hindi Usage: प्राचीन पेड़ अनंत काल पुराना है और कई पीढ़ियों को आते-जाते देखा है।

Used in a hyperbolic sense to refer to an extremely long time.

बेहद लंबा समय

English Usage: It feels like it has been eons since we last met.

Hindi Usage: ऐसा लगता है कि हम आखिरी बार मिले थे अनंत काल पहले।